One, from that error message alone I can't figure out what is happening and
why when you run tests, so I can't help there.
But two: you don't have a ManyToManyField, you have TWO ManyToManyFields.
If you define a many to many field on one model, than it's automatically
also defined on the other (if you only have the one on Pizza, then you can
do topping.pizza_set.all() from the other side.
So your current code is almost certainly wrong, but if these are your exact
models than I don't think they are related to your error.
Remco
On Fri, Dec 4, 2015 at 9:54 AM, filias <filipa.andr...@gmail.com> wrote:
> Hi,
>
> I have recently upgraded to sjango 1.8 and I have 2 models with a
> bi-directional ManyToMany field. It looks like this
>
> class Pizza(Model):
> available_toppings = ManyToManyField('Topping')
>
> class Topping(Model):
> all_pizzas = ManyToManyField(Pizza,
> through=Pizza.available_stoppings.through, verbose_name='available pizzas')
>
> Everything was fine in django 1.7 but right now when running tests,
> specifically when creating the test database, I get this exception:
>
> self = <django.db.backends.sqlite3.base.SQLiteCursorWrapper object at
> 0x7fd24fca4b00>
>
> def execute(self, query, params=None):
> if params is None:
>
> > return Database.Cursor.execute(self, query)
> E OperationalError: table "products_pizza_available_toppings"
> already exists
>
> So it looks like the creation of the test database is trying to re-create
> the intermediate table for the ManyToMany.
>
> I do not get any exception when running my site.
>
> Does anyone know how can I fix this?
>
> Thank you in advance
>
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